Place the chicken breasts in the bottom of the slow cooker. Add the black beans, corn, and diced tomatoes with green chilies on top.
Pour in the chicken broth. Sprinkle the chili powder, cumin, garlic powder, and salt over everything.
Cover and cook on low for 6 to 8 hours or on high for 3 to 4 hours until the chicken is tender and shreds easily.
Remove the chicken, shred it with two forks, and return it to the slow cooker. Stir to combine.
Ladle the soup into bowls and add tortilla chips plus any desired toppings right before serving.